Rotary toothbrush



Jan. 16, 1923;

M. C. SLOAN. lRoTARY TOOTHBRUSH.

FILED MMLZG, 1921 Patented Jen. 16,1923.

UNITED STATES 1,442,303u PATENT-',OFFICE.

MORRIS C. SLOAN, or onenedimemors. i

ROTARY TOOTHBRUSH.

Application inea Meren as, 1921; serial- Ne. 455,783.

To all whom it mayy concern.'

Be it known that I, Morris C. SLoAN, a citizen of the United States, and al resident of the city off Chicago, count-y of Cook, and State of Illinois, have invented certain new and useful Improvements `in Rotary lIoothbrushes, of which the following is' a` specification. l

My invention relates to a rotary tooth brush and has for its main object the provision of a rotary brush provided with two bristle bearing members, one adapted to brush the inside and one the outside'of the teeth. f

Other objects will appear hereinafter.

The invention consists in the combinations and arrangements of parts hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawings forming a part of this specification, and in which,

F 1 is a side elevational view, partly in Isection along line 1-1 of Fig. 2;

Fig. 2 is a sectional view taken on line 2 of Fig. 1; e Fig. 3 is an end elevation;

Fig. 4 is a sectional view taken on line 4--4 of Fig. 3;

Fig. 5 is a sectional view taken on line 5-5 of Fig. 1, and i Fig. 6 is a sectional view taken on line 6-6 of Fig. 1.

The form of invention illustrated comprises a casing 10 provided with a cover plate 11 fastened thereon by screws 12. A gear wheel 13 is mounted in said casing to rotate with a shaftlt fastened to said gear by a key 15 or in any similar manner. One end of said shaft is journaled in an extension 16 on the interior of plate 11 and the other end is formed integrally with the operating crank 17 provided with a handle 18. At the upper end of the casing a sleeve 19 is fastened in which a tube 20 is mounted and rotated by the gear wheel 13 which engages teeth 21 on said tube.` In each end of said tube a stem is fastened in any convenient manner as by means of a screw and each of said stems carries a. series of bristles around its surface as shown in the drawing. The bristles on one stem are longer around the central portion of the stem and the bristles on the other stem are shorter around the cen tral portion and longer around the ends. A curved member or shell 23 is movably mounted upon each end'of1sleeve1'9 byl means of a resilient collar 24 clamped firmly' onl said slee-ve, andl has tliepointed endA 25 of stem 22pivotallly rest-ingina depression formed in the'laterallybent endA 261n of' sai-d shell. -A handle 27 is threaded `into casing 10.1

In use'thel shellis placedu {againstthe lip orgum to-protectthe'same and the'exposed bristles placed against the teeth, vthe brush is then rotated by means of the handle'18' so that the bristles travelA from the gums t0- ward-the ends of the teeth.- The brush with the-convex surface-is used to'clean thev teeth from the insiydeof the mouth and the brush with the concave surface is used to clean the teeth from the outside.

While I have illustrated and described the preferred form of constructionfor carrying my invention into effect, this is capable of variation and modification without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but

desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having described my invention, what I claim as new and desire to vsecure by Let-y ters Patent is: l

1. A rotary tooth brush comprising a casing, a member rotatably mounted across the edge of said casing, a brush removably mounted in each end of said member, a wheel mounted in said casing to directly engage and rotate said member, and means to actuate said wheel.

2. A rotary tooth brush comprising a casing, a member rotatably mounted across the edge of said casing, a brush fastened to said member, a gear wheel mounted in said casing to engage and rotate said member, a shell removably mounted on said casing to partly cover said brush, a supporting handle moimted on said casing, and means to actu-` ate said gear wheel.

3. A rotary tooth brush comprising a casing, a tubular member rotatably'mounted on said casing, teeth formed by providing spa-ced openings' around said member, a

brush fastened to-each end of said tubular y member)` a gear wheel rotatably mounted in said casing in mesh with the teeth on said member, and means to rotate said wheel.

4. A. rotary tooth brush comprising a `casing, a tubular member rotatably mounted across the edge of said casing, a brush removably mounted in each end of said tubular member, a pivot pin at the free end of each brush, and means to partly cover eaeh brush and protect the mouth, said means engaging the outer ends of said pivot pins.

5. A rotary tooth brush. comprising a casing, a sleeve fastened to the edge of said easing, a tubular member rotatably mounted in said sleeve, a brush fastened in each end of said tubular member, and means to rotate said member.

6. A rotary tooth brush comprising,` a casing, a sleeve fastened to the edge of said easing, a tubular member rotatably mounted in said sleeve, a brush fastened in each end. of said tubular member, means to rotate said member, a handle to actuate said means, and a shell removably clamped on each end of said sleeve.

7. A device comprising a easing, a sleeve fastened on said casing, a tubular member rotatably mounted in said sleeve, a tooth brush fastened in each end of said tubular member, and a shell removably clamped von each end of said sleeve, said shell extending over each brush and engaging the outer end thereof.

S. A rotary tooth brush comprising a easing, a sleeve fastened to said easing and provided With a peripheral opening, a member rotatably mounted in said sleeve, teeth on said member, a brush fastened in each end of said member, a gear to engage said teeth through the opening in said sleeve and rotate said member, and means to aetuate said-gear. l

In testimony whereof I have signed my name to this specification in the presence of tWo subscribing Witnesses.

MORRIS C. SLOAN.

Witnesses:

FREDA C. APPLEToN, MATILDA RIFE. 

